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  1. #1
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    MX-C311 Color Calibration

    I have been working on a Sharp MX-C311 which has terrible copy quality. Another tech ran a color calibration on the machine which actually made it worse. I ran sim 44-02 and got errors on PCS_K LED ADJ, REG_R LED ADJ, and REG_F LED ADJ. I replaced both the transfer belt and registration unit with ones out of a machine that worked. Despite that SIM 44-02 still gets errors in the same places. Any suggestions on things to try or what other components might be malfunctioning?

  2. #2
    Service Manager 1,000+ Posts bilyahn's Avatar
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    Re: MX-C311 Color Calibration

    check your black drum K looks like all 3 errors could be related to the same thing. Front and rear registration problem as well as blk drum patch error.

    Good luck.

    Bil

  3. #3
    Senior Tech 100+ Posts
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    Re: MX-C311 Color Calibration

    take it apart and clean everything...then run sim 50-22 and adjust the skew...then 44-2; 44-6; 44-26; 46-24...


    Item/Display Content Setting
    range
    Default
    value
    A PCS_CL LED ADJ Color sensor light
    emitting quantity
    adjustment value
    1 - 255 21
    B PCS_K LED ADJ Black sensor light
    emitting quantity
    adjustment value
    1 - 255 21
    C PCS_CL DARK Dark voltage of color 0 - 255 0
    D PCS_K DARK Dark voltage of black 0 - 255 0
    E PCS_K GRND Belt substrate when
    the item B
    adjustment is
    completed.
    0 - 255 0
    F PCS_K BELT MAX Belt substrate input
    max. value
    0 - 255 0
    G PCS_K BELT MIN Belt substrate input
    min. value
    0 - 255 0
    H PCS_K BELT DIF Belt substrate input
    difference
    (Item E - Item F)
    0 - 255 0
    I REG_F LED ADJ Registration sensor
    light emitting
    quantity adjustment
    value F
    1 - 255 56
    J REG_F DARK Registration sensor
    dark voltage F
    0 - 255 0

  4. #4
    Senior Tech 250+ Posts
    MX-C311 Color Calibration


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    Re: MX-C311 Color Calibration

    Quote Originally Posted by hRyan View Post
    I have been working on a Sharp MX-C311 which has terrible copy quality. Another tech ran a color calibration on the machine which actually made it worse. I ran sim 44-02 and got errors on PCS_K LED ADJ, REG_R LED ADJ, and REG_F LED ADJ. I replaced both the transfer belt and registration unit with ones out of a machine that worked. Despite that SIM 44-02 still gets errors in the same places. Any suggestions on things to try or what other components might be malfunctioning?
    ,

    replace the resist sensor . it reads the patches on the transfer belt. it sits next to fuser and gets cooked. p/n CHLDZ2001DS53. there will be a sticker on the resist sensor unit it has the base values to enter into the sim mode , check service manual.

  5. #5
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    Re: MX-C311 Color Calibration

    I figured out the issue with your guys help. Thanks. I ended up taking the guts of the machine out again and doing another thorough cleaning. I then ran SIM 50-22 and discovered that even without turning the adjustment screws the skew values would change by more than 10 points for each lens. I replaced the LSU and started back at the beginning of the calibration and lo and behold, the errors in 44-02 were gone and the machine began producing much better quality copies.

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